A two-dimensional finite element numerical model was developed to predict local scour around a vibration submarine pipeline in steady current. The numerical model was based on incompressible two-dimensional Navier-Stokes equations with a Shear-Stress Transport (SST) k-ω turbulence model closure. The transportations of suspended load and the bed load were taken into consideration in the present numerical simulation. The moving boundaries induced by the vibration pipeline and the evolution of the seabed due to local scour were tracked by using the Arbitrary Lagrangian Eulerian (ALE) method. Comparisons between the numerical results and available experimental data showed satisfactory agreements. The local scour around a vibrating pipeline has been investigated, including the maximum scour depth below the pipeline, the vortex shedding mode and the vibration amplitude of the pipeline. The numerical results showed that the maximum vibration amplitude of the pipeline could be about 1.2D, and the maximum scour depth occurred in the wake side of the vibration pipeline.

建立了二维有限元数值模型，以预测稳定电流下海底振动管道周围的局部冲刷。数值模型基于具有剪切-应力传输（SST）k - ω的不可压缩二维Navier-Stokes方程湍流模型闭合。在目前的数值模拟中考虑了悬吊荷载和床荷载的传递。使用任意拉格朗日欧拉（ALE）方法跟踪了振动管道引起的运动边界和局部冲刷引起的海床演化。数值结果和可用的实验数据之间的比较表明令人满意的协议。研究了振动管道周围的局部冲刷，包括管道下方的最大冲刷深度，涡旋脱落模式和管道的振动幅度。数值结果表明，管道的最大振动幅度约为1.2 D，最大冲刷深度出现在管道的尾流侧。